0 2,?3-?Dihydro-?2-?oxo-1H-?benzimidazole-?1-?butanoic acid CAS 3273-68-5 In Intermediates, Pharmaceutical Chemicals, Products 3273-68-5,2,?3-?Dihydro-?2-?oxo-1H-?benzimidazole-?1-?butanoic acid,2-Oxo-1-benzimidazolinebutyric acid